I guess it depends why you are still at home in a way - there is nothing wrong with doing it to save money, etc. Lots of my friends in their 20s-early 30s have done it to save for going travelling or to recover financially when they come back

Generally, however, they treat it more as a flatting (rooming) situation, where they are not answerable for their whereabouts - e.g. out of courtesy they'll just say when they'll be home or when they will not be.

Is there a particular reason that your friends are overly protective of you?

I don't see the opportunity for you to grow and develop as a person if you are in the situation you describe, though.

All the best.